Wall anchor



FIG. 1 is a perspective view of an embodiment of our ornamental design of a wall anchor;

FIG. 2 is a top plan view of the ornamental design of the wall anchor of FIG. 1;

FIG. 3 is a front elevation view of the ornamental design of the wall anchor of FIG. 1;

FIG. 4 is a bottom plan view of the ornamental design of the wall anchor of FIG. 1;

FIG. 5 is a right elevation view of the ornamental design of the wall anchor of FIG. 1;

FIG. 6 is a left elevation view of the ornamental design of the wall anchor of FIG. 1; and,

FIG. 7 is a rear elevation view of the ornamental design of the wall anchor of FIG. 1. 

We claim the ornamental design for a wall anchor, as shown and described. 